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Title: Three-axis particle impact probe

Abstract

Three-axis particle impact probes detect particle impact vectors along x-, y-, and z-axes by spherical probe head mounted on the outer end of a shaft that is flexibly mounted in silicone rubber at the top of a housing so as to enable motion imparted to the head upon impact to be transmitted to a grounded electrode secured to the shaft within the housing. Excitable electrodes are mounted in the housing in a fixed position, spaced apart from the ground electrode and forming, with the ground electrode, capacitor pairs. Movement of the ground electrode results in changes in capacitance, and these difference in capacitance are used for measurement or derivation of momentum vectors along each of the three axes. In one embodiment, the ground electrode is mounted at the base of the shaft and is secured to a silicone rubber layer at the top of the housing, providing for cantilevered movement. In another embodiment, the shaft is mounted at its mid point in a flexible bushing so that it undergoes pivotal movement around that point.

Inventors:
 [1];  [1];  [1]
  1. (Morgantown, WV)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
868457
Patent Number(s):
5144251
Assignee:
United States of America as represented by United States (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
three-axis; particle; impact; probe; probes; detect; vectors; x-; y-; z-axes; spherical; head; mounted; outer; shaft; flexibly; silicone; rubber; top; housing; enable; motion; imparted; transmitted; grounded; electrode; secured; excitable; electrodes; fixed; position; spaced; apart; ground; forming; capacitor; pairs; movement; results; changes; capacitance; difference; measurement; derivation; momentum; axes; embodiment; base; layer; providing; cantilevered; mid; flexible; bushing; undergoes; pivotal; spaced apart; ground electrode; fixed position; silicone rubber; particle impact; probe head; pivotal movement; grounded electrode; three-axis particle; probes detect; /324/73/

Citation Formats

Fasching, George E., Smith, Jr., Nelson S., and Utt, Carroll E. Three-axis particle impact probe. United States: N. p., 1992. Web.
Fasching, George E., Smith, Jr., Nelson S., & Utt, Carroll E. Three-axis particle impact probe. United States.
Fasching, George E., Smith, Jr., Nelson S., and Utt, Carroll E. Wed . "Three-axis particle impact probe". United States. https://www.osti.gov/servlets/purl/868457.
@article{osti_868457,
title = {Three-axis particle impact probe},
author = {Fasching, George E. and Smith, Jr., Nelson S. and Utt, Carroll E.},
abstractNote = {Three-axis particle impact probes detect particle impact vectors along x-, y-, and z-axes by spherical probe head mounted on the outer end of a shaft that is flexibly mounted in silicone rubber at the top of a housing so as to enable motion imparted to the head upon impact to be transmitted to a grounded electrode secured to the shaft within the housing. Excitable electrodes are mounted in the housing in a fixed position, spaced apart from the ground electrode and forming, with the ground electrode, capacitor pairs. Movement of the ground electrode results in changes in capacitance, and these difference in capacitance are used for measurement or derivation of momentum vectors along each of the three axes. In one embodiment, the ground electrode is mounted at the base of the shaft and is secured to a silicone rubber layer at the top of the housing, providing for cantilevered movement. In another embodiment, the shaft is mounted at its mid point in a flexible bushing so that it undergoes pivotal movement around that point.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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